单项选择题
A.low lube oil temperature
B.low starting air temperature
C.air in the fuel injection
D.water in the starting air system
单项选择题 Which of the following statements represents the reason for rolling over a diesel engine with the cylinder indicator cocks open prior?（）
单项选择题 In a diesel engine, a positive displacement type blower is usually （）
单项选择题 If you suspect a diesel engine is misfiring due to air leakage into the fuel system, you should begin looking for the leak at the （）